Results 21 to 30 of about 4,985 (290)

EVALUATION OF CURRENT SIGNALS AT OBSERVED POINTS OF THE ELECTRICAL NETWORK IN PROBLEMS OF IDENTIFICATION OF CURRENT TRANSFORMER SATURATION

Вестник Северо-Кавказского федерального университета, 2022
Despite the fact that the problem of saturation of current transformers (CT) has been known for a long time, it has not lost its relevance now. Cases of malfunctioning as a result of oversaturation of CT are still recorded today.
P. Shagimardanov
doaj   +1 more source

An Artificial Neural Network Developed in MATLAB-Simulink for Reconstruction a Distorted Secondary Current Waveform. Part 1

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2021
Recently, there has been an increased interest in the use of artificial neural networks in various branches of the electric power industry including relay protection.
Yu. V. Rumiantsev, F. A. Romaniuk
doaj   +1 more source

Simulation of the saturation process of a current transformer with a load [PDF]

Journal Of Applied Informatics, 2021
The article deals with the mathematical basis and simulation of the saturation processes of current transformers with aperiodic components of short-circuit currents. Saturation processes of current transformers can affect the correct operation of the protections.
Kirill K. Krutikov, Vyacheslav V. Rozhkov, Vladimir V. Fedotov   +2 more
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THREE-PHASE TRANSFORMER PARAMETERS CALCULATION CONSIDERING THE CORE SATURATION FOR THE MATLAB-SIMULINK TRANSFORMER MODEL

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2015
This article describes the parameters calculation for the three-phase two-winding power transformer model taken from the SimPowerSystems library, which is the part of the MatLab- Simulink environment.
I. V. Novash, Yu. V. Rumiantsev
doaj   +2 more sources

Comparison of Mathematical Methods for Compensating a Current Signal under Current Transformers Saturation Conditions [PDF]

Sensors, 2021
Current measurements from electromagnetic current transformers are essential for the construction of secondary circuit systems, including for protection systems. Magnetic core of these transformers are at risk of saturation, as a result of which maloperation of protection algorithms can possibly occur.
Ismoil Odinaev, Aminjon Gulakhmadov, Pavel Murzin, Alexander Tavlintsev, Sergey Semenenko, Evgenii Kokorin, Murodbek Safaraliev, Xi Chen   +7 more
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An Artificial Neural Network Developed in MATLAB-Simulink for Reconstruction a Distorted Secondary Current Waveform. Part 2

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2022
Recently, there has been an increased interest in the use of artificial neural networks in various branches of the electric power industry including relay protection.
Yu. V. Rumiantsev, F. A. Romaniuk
doaj   +1 more source

Controlling Transformer Magnetizing Offset Current in Isolated Phase-Shift Full-Bridge Converters Using a Luenberger Observer

International Transactions on Electrical Energy Systems, 2022
This paper proposes a flexible digital control scheme for isolated phase-shift full-bridge (PSFB) converters. The required transformer suffers from inevitable imbalance of magnetic flux resulting in an increased magnetizing DC-offset current that ...
Angelika Neumann, Sönke Meynen, Ahmad Rahmoun, Daniel Ziegler, Thomas Kirchartz   +4 more
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The.main types of wind turbines-generators in the power supply system

Известия высших учебных заведений: Проблемы энергетики, 2022
THE PURPOSE. This paper considers the problem of relay protection functioning when the current transformer reaches the saturation mode which is provided by transient processes.METHODS. MATLAB Simulink software environment allows reproducing the method of
V. A. Novobritsky, D. S. Fedosov
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CURRENT TRANSFORMER ERROR COMPENSATION UNDER SATURATION CONDITION [PDF]

, 2021
The paper presents a method to compensate the error of current transformer under saturation condition. Based on least square method the factor decision process is shown.
Morozenko, N. A., Морозенко, Н. А., Паздерин, А. В., Odinaev, I. N., Murzin, P. V., Одинаев, И. Н., Pazderin, А. V., Мурзин, П. В.   +7 more
core  

Research on Transient Low-Frequency Oscillation of Electrified Railway Vehicle-Grid Coupling System

IEEE Access, 2023
At the moment of electric locomotive passing the neutral-section, the voltage and current of traction network may have low-frequency oscillation (LFO), which will seriously affect the safe operation of the railway. Aiming at eliminating the transient LFO,
Zhiyong Li, Jiahua Pi, Yuan Cao, Yefan Wu, Zhijie Jia   +4 more
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